CN114095937A - Control device, recording medium, and system - Google Patents

Control device, recording medium, and system Download PDF

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Publication number
CN114095937A
CN114095937A CN202110672963.6A CN202110672963A CN114095937A CN 114095937 A CN114095937 A CN 114095937A CN 202110672963 A CN202110672963 A CN 202110672963A CN 114095937 A CN114095937 A CN 114095937A
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China
Prior art keywords
communication
ble
uwb
control
unit
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CN202110672963.6A
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Chinese (zh)
Inventor
内木一辉
古贺健一
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Tokai Rika Co Ltd
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Tokai Rika Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/60—Context-dependent security
    • H04W12/63—Location-dependent; Proximity-dependent
    • H04W12/64—Location-dependent; Proximity-dependent using geofenced areas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00309—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated with bidirectional data transmission between data carrier and locks
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
    • G07C9/00896—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys specially adapted for particular uses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/009—Security arrangements; Authentication; Protecting privacy or anonymity specially adapted for networks, e.g. wireless sensor networks, ad-hoc networks, RFID networks or cloud networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/06—Authentication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
    • H04W12/10—Integrity
    • H04W12/108—Source integrity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Lock And Its Accessories (AREA)
  • Selective Calling Equipment (AREA)

Abstract

The invention relates to a control device, a recording medium and a system, which effectively restrain the power consumption required by UWB communication. The control device is provided with: at least one BLE communication unit that performs BLE communication, which is wireless communication according to a BLE communication standard, with another communication device; at least one UWB communication unit that performs UWB communication, which is wireless communication according to a UWB communication standard, with the other communication device; and a control unit that controls the BLE communication by the BLE communication unit and the UWB communication by the UWB communication unit, wherein the control unit performs control so that the UWB communication is started when the BLE communication is established.

Description

Control device, recording medium, and system
Technical Field
The invention relates to a control device, a recording medium and a system.
Background
In recent years, a technique of performing authentication based on a result of transmitting and receiving a signal between apparatuses has been developed. For example, patent document 1 listed below discloses a system in which a portable device is authenticated by transmitting and receiving a signal between an in-vehicle device and the portable device, and a vehicle is controlled based on the result of the authentication.
Patent document 1: japanese patent laid-open publication No. 2018-71190
In the above system, the distance measurement for calculating the distance between the in-vehicle device and the portable device 10 is performed by Ultra Wide Band (UWB) wireless communication, and the obtained distance measurement value is used for authentication. In order to perform such distance measurement, it is required that one of the in-vehicle device and the portable device is on standby in a state where it can receive a signal. However, as the standby time is longer, the power consumption increases.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to effectively suppress power consumption required for UWB communication.
In order to solve the above problem, according to an aspect of the present invention, there is provided a control device including: at least one BLE communication unit that performs BLE communication, which is wireless communication according to a BLE communication standard, with another communication device; at least one UWB communication unit that performs UWB communication, which is wireless communication according to a UWB communication standard, with the other communication device; and a control unit that controls the BLE communication by the BLE communication unit and the UWB communication by the UWB communication unit, wherein the control unit performs control so that the UWB communication is started when the BLE communication is established.
In order to solve the above problem, according to another aspect of the present invention, there is provided a recording medium storing a program for causing a computer to realize: at least one BLE communication function that performs wireless communication, i.e., BLE communication, with another communication device according to a BLE communication standard; at least one UWB communication function for performing UWB communication, which is wireless communication according to the UWB communication standard, with the other communication device; and a control function that controls the BLE communication by the BLE communication function and the UWB communication by the UWB communication function, and causes the control function to execute control so that the UWB communication is started when the BLE communication is established.
In order to solve the above problem, according to another aspect of the present invention, there is provided a system including a control device and a communication device, the control device including: at least one BLE communication unit configured to perform BLE communication, which is wireless communication according to a BLE communication standard, with the communication device; at least one UWB communication unit that performs UWB communication, which is wireless communication according to a UWB communication standard, with the communication device; and a control unit that controls the BLE communication by the BLE communication unit and the UWB communication by the UWB communication unit, wherein the control unit performs control so that the UWB communication is started when the BLE communication is established.
As described above, according to the present invention, power consumption required for UWB communication can be effectively suppressed.
Drawings
Fig. 1 is a block diagram showing an example of the configuration of a system 1 according to an embodiment of the present invention.
Fig. 2 is a sequence diagram showing an example of the flow of the processing of the system 1 according to the embodiment.
Fig. 3 is a sequence diagram showing an example of the flow of the processing of the system 1 according to the embodiment.
Description of reference numerals: 1 … system, 10 … portable machine, 110 … BLE communication part, 120 … UWB communication part, 130 … control part, 20 … vehicle-mounted device, 210 … BLE communication part, 220 … UWB communication part, 230 … control part.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, the same reference numerals are given to components actually having the same functional configurations, and redundant description thereof is omitted.
< 1. embodiment >
1.1 System construction example
First, a configuration example of the system 1 according to an embodiment of the present invention will be described. Fig. 1 is a block diagram showing a configuration example of a system 1 according to the present embodiment. As shown in fig. 1, the system 1 of the present embodiment includes a portable device 10 and an in-vehicle device 20.
(Portable device 10)
First, the mechanism configuration of the mobile device 10 of the present embodiment is described. The portable device 10 of the present embodiment is an information processing device carried by a user using a mobile body such as a vehicle mounted on the in-vehicle device 20. The mobile device 10 of the present embodiment may be a smartphone or a dedicated device, for example.
The mobile device 10 of the present embodiment is an example of the control device and the communication device in the present invention.
As shown in fig. 1, the portable device 10 according to the present embodiment includes a BLE communication unit 110, a UWB communication unit 120, and a control unit 130.
(BLE communication unit 110)
The BLE communication unit 110 of the present embodiment performs BLE communication, which is wireless communication according to a BLE (Bluetooth Low Energy) communication standard, with the in-vehicle device 20. BLE communication according to the present embodiment will be described in detail.
(UWB communication section 120)
The UWB communication unit 120 of the present embodiment performs UWB communication, which is wireless communication conforming to the UWB communication standard, with the in-vehicle device 20.
(control section 130)
The control unit 130 of the present embodiment controls each configuration provided in the portable device 10.
For example, the control unit 130 according to the present embodiment controls BLE communication by the BLE communication unit 110 and UWB communication by the UWB communication unit 120.
At this time, one of the features of the control unit 130 according to the present embodiment is to perform control so that UWB communication is started when BLE communication is established.
By such control, it is possible to avoid setting the UWB communication unit 120 to a state in which UWB communication is possible at all times, and it is possible to effectively suppress power consumption required for UWB communication.
More specifically, when the BLE communication is established, the control unit 130 according to the present embodiment may cause the UWB communication unit 120 to start a process related to transmission or reception of a signal transmitted and received in the UWB communication.
The signals transmitted and received in the UWB communication include, for example, a first UWB signal and a second UWB signal used for estimating the positional relationship between the portable device 10 and the in-vehicle device 20.
The positional relationship between the portable device 10 and the in-vehicle device 20 may be, for example, the distance between the portable device 10 and the in-vehicle device 20.
The distance between the portable device 10 and the in-vehicle device 20 is acquired based on ranging based on a first UWB signal transmitted by one device and a second UWB signal transmitted by another device in response to the first UWB signal.
In the above ranging, the time Δ T1 from the time when one device transmits the first UWB signal to the time when the second UWB signal is received, and the time Δ T2 from the time when the other device receives the first UWB signal to the time when the second UWB signal is transmitted are used.
Specifically, the time required for communication of the round trip of the UWB signals (the first UWB signal and the second UWB signal) is calculated by subtracting the time Δ T2 from the time Δ T1. Further, the time required for one-way communication of the UWB signal is calculated by dividing the time by 2. Then, the distance between the portable device 10 and the in-vehicle device 20 (hereinafter, also referred to as a distance measurement value) can be obtained by multiplying the value of (time Δ T1-time Δ T2)/2 by the signal speed.
In the ranging as described above, the UWB communication unit 120 of the portable device 10 may transmit the first UWB signal and receive the second UWB signal as a response to the first UWB signal.
In this case, the control unit 130 can acquire the distance measurement value by acquiring information on the time Δ T2 from the in-vehicle device 20. In this case, the control unit 130 causes the UWB communication unit 120 to transmit the ranging value to the in-vehicle device 20.
Therefore, for example, the control unit 130 according to the present embodiment may cause the UWB communication unit 120 to transmit the first UWB signal when BLE communication is established.
According to the control described above, the UWB communication unit 120 can be caused to transmit the first UWB signal in a situation where BLE communication is established and it is estimated that UWB communication can be established in the same way, and it is possible to avoid a situation where the first UWB signal is unnecessarily transmitted in a situation where establishment of UWB communication is difficult.
On the other hand, the UWB communication unit 120 of the portable device 10 may receive the first UWB signal and transmit the second UWB signal in response to the first UWB signal.
In this case, the control unit 130 may cause the UWB communication unit 120 to transmit information about the time Δ T2 to the in-vehicle device 20, thereby causing the in-vehicle device 20 to acquire the distance measurement value.
Therefore, for example, the control unit 130 according to the present embodiment may execute control so that the UWB communication unit 120 can receive the first UWB signal when BLE communication is established.
That is, the control unit 130 may shift the UWB communication unit 120 to the reception standby state when BLE communication is established, instead of always putting the UWB communication unit 120 in the reception standby state (state for receiving signals).
According to the control as described above, the timing at which the UWB communication unit 120 acquires the reception standby state can be limited to the timing at which the first UWB signal is transmitted from the in-vehicle device 20, and power consumption can be effectively suppressed.
The functions of the control unit 130 according to the present embodiment can be realized by various processors.
The functional configuration example of the mobile device 10 according to the present embodiment is described above. The functional configuration described above is merely an example, and the functional configuration of the portable device 10 according to the present embodiment is not limited to such an example. For example, the portable device 10 may further include an operation unit for receiving an operation by a user, a display unit for displaying various information, and the like. The functional configuration of the portable device 10 according to the present embodiment can be flexibly changed depending on the specification and the operation.
(Car-mounted device 20)
Next, a functional configuration of the in-vehicle device 20 of the present embodiment will be described. The in-vehicle device 20 of the present embodiment is an information processing device mounted on a mobile body such as a vehicle.
The in-vehicle device 20 of the present embodiment is an example of the control device and the communication device in the present invention.
As shown in fig. 1, the in-vehicle device 20 of the present embodiment includes a BLE communication unit 210, a UWB communication unit 220, and a control unit 230.
(BLE communication unit 210)
The BLE communication unit 210 according to the present embodiment performs BLE communication, which is wireless communication according to a BLE communication standard, with the portable device 10. The in-vehicle device 20 of the present embodiment includes at least one BLE communication unit 210.
(UWB communication part 220)
The UWB communication unit 220 of the present embodiment performs UWB communication, which is wireless communication conforming to the UWB communication standard, with the mobile device 10. The in-vehicle device 20 of the present embodiment includes at least one UWB communication unit 220.
(control section 230)
The control unit 230 of the present embodiment controls each configuration provided in the in-vehicle device 20.
For example, control unit 230 of the present embodiment controls BLE communication by BLE communication unit 210 and UWB communication by UWB communication unit 220.
At this time, one of the features of the control unit 230 according to the present embodiment is to perform control so that UWB communication is started when BLE communication is established.
By such control, it is possible to avoid setting UWB communication unit 220 to a state in which UWB communication is possible at all times, and power consumption required for UWB communication can be effectively suppressed.
More specifically, when BLE communication is established, control unit 230 of the present embodiment may cause UWB communication unit 220 to start processing related to transmission or reception of signals transmitted and received in UWB communication.
For example, as described above, a case is assumed where ranging based on the first UWB signal and the second UWB signal is performed.
In this case, for example, when BLE communication is established, control unit 230 of the present embodiment may cause UWB communication unit 220 to transmit the first UWB signal.
According to the control described above, UWB communication can be established and UWB communication can be estimated to be established in the same manner, and UWB communication unit 220 can be caused to transmit the first UWB signal, thereby avoiding unnecessary transmission of the first UWB signal in a situation where establishment of UWB communication is difficult.
For example, control unit 230 according to the present embodiment may execute control such that UWB communication unit 220 can receive the first UWB signal when BLE communication is established.
According to the control described above, the timing at which the UWB communication unit 220 acquires the reception standby state can be limited to the timing at which the first UWB signal is transmitted from the portable device 10, and power consumption can be effectively suppressed.
On the other hand, the positional relationship between the portable device 10 and the in-vehicle device 20 according to the present embodiment is not limited to the distance between the portable device 10 and the in-vehicle device 20. The positional relationship includes, for example, the direction of the portable device 10 with respect to the in-vehicle device 20.
For example, when the in-vehicle device 20 of the present embodiment includes two or more UWB communication units 220 (antenna elements), the control unit 230 may estimate the Arrival Angle (AoA: Angle of Arrival) of the first UWB signal from the portable device 10 based on the phase difference of the first UWB signal received by the two or more UWB communication units 220.
In this case, control unit 230 according to the present embodiment may execute control such that UWB communication unit 220 can receive the first UWB signal when BLE communication is established.
The control unit 230 of the present embodiment controls the controlled device based on the positional relationship between the portable device 10 and the in-vehicle device 20, such as the distance between the portable device 10 and the in-vehicle device 20, and the direction of the portable device 10 with respect to the in-vehicle device 20.
For example, the control unit 230 of the present embodiment may cause the controlled device to execute a predetermined operation when it is determined that the portable device 10 and the in-vehicle device 20 are in a predetermined positional relationship based on the UWB communication.
As an example, the control unit 230 may cause the controlled device to execute a predetermined operation when it is determined that the distance between the portable device 10 and the in-vehicle device 20 acquired by the distance measurement by the UWB communication is within a predetermined range.
As an example, the control unit 230 may cause the controlled device to execute a predetermined operation when it is determined that the direction of the portable device 10 estimated by the UWB communication is within a predetermined range.
As an example, the control unit 230 may cause the controlled device to execute a predetermined operation when it is determined that the distance between the portable device 10 and the in-vehicle device 20 is within a predetermined range and the direction of the portable device 10 with respect to the in-vehicle device 20 is within a predetermined range.
According to the control as described above, for example, compared to a case where the controlled device is controlled based on authentication using a Low Frequency (LF) band signal and a High Frequency (UHF) band signal, it is possible to eliminate the fear of relay attack and realize safer authentication.
Examples of the controlled device according to the present embodiment include a lock device, an engine, an accelerator, a brake, a steering device, and an illumination device, which are provided in a mobile body on which the in-vehicle device 20 is mounted, and which lock and unlock a door.
For example, the control unit 230 of the present embodiment may instruct the lock device to unlock the door when it is determined that the portable device 10 and the in-vehicle device 20 are in the predetermined positional relationship.
For example, the control unit 230 of the present embodiment may permit the engine to be started when it is determined that the portable device 10 and the in-vehicle device 20 are in the predetermined positional relationship.
For example, the control unit 230 of the present embodiment may execute control such that the mobile unit is automatically parked in the parking space when it is determined that the mobile unit 10 and the in-vehicle device 20 are in the predetermined positional relationship.
For example, the control unit 230 of the present embodiment may assist the user in boarding the mobile unit by lighting an illumination device provided under a door of the mobile unit when it is determined that the mobile unit 10 and the in-vehicle device 20 are in the predetermined positional relationship.
According to the control described above, various processes can be controlled according to the positional relationship between the portable device 10 and the in-vehicle device 20, and convenience can be improved.
As described above, the control unit 230 according to the present embodiment may start UWB communication when BLE communication is established, and may control the controlled device based on the positional relationship between the portable device 10 and the in-vehicle device 20 estimated from the UWB communication.
At this time, control unit 230 according to the present embodiment may determine whether or not BLE communication is established based on the second BLE signal transmitted from portable device 10 in response to the first BLE signal transmitted from BLE communication unit 210 during BLE communication.
For example, the control unit 230 according to the present embodiment may determine that BLE communication is established when the Received Signal Strength (RSSI) of the second BLE Signal Received by at least one BLE communication unit 210 exceeds a predetermined threshold.
In an environment where a sufficient received signal strength can be obtained in BLE communication, it is expected that a sufficient received signal strength can be obtained also in UWB communication, and more stable UWB communication and control of a controlled device by the UWB communication can be realized.
For example, the control unit 230 according to the present embodiment may determine that BLE communication is established when at least two or more BLE communication units 210 receive the second UWB signal from the portable device 10.
In an environment where the BLE communication units 210 can communicate with the portable device 10, it is expected that the communication can be performed also in UWB communication, and more stable UWB communication and control of a controlled device by the UWB communication can be realized.
For example, the control unit 230 according to the present embodiment may determine that BLE communication is established when the authenticity of the mobile device 10 is confirmed based on the second BLE signal received by the BLE communication unit 210.
In this case, for example, the first BLE signal transmitted by the BLE communication unit 210 may be a signal requesting an identifier such as an ID of the mobile device 10, and the second BLE signal transmitted by the mobile device 10 in response to the first BLE signal may be a signal including the identifier.
For example, the first BLE signal transmitted by the BLE communication unit 210 may be a signal including a random number or the like, and the second BLE signal transmitted by the portable device 10 in response to the first BLE signal may be a signal including a calculation result (for example, a hash value calculated using a hash function) calculated using the random number and key information shared in advance.
According to the control described above, even when the authenticity of the portable device 10 is confirmed in BLE communication, more secure UWB communication can be realized with an authorized object.
For example, the control unit 230 according to the present embodiment may execute ranging based on a phase difference between the first BLE signal and the second BLE signal, and determine that BLE communication is established when the acquired ranging value is within a predetermined range.
When the distance between the portable device 10 and the in-vehicle device 20 is within a predetermined range, the UWB communication can be expected to be more stable, and the control of the controlled device with high accuracy by the UWB communication can be realized.
The determination of establishment of BLE communication by control unit 230 according to the present embodiment has been described above with specific examples. The control unit 230 of the present embodiment can determine establishment of BLE communication between the portable device 10 and the in-vehicle device 20 with high accuracy by performing the above-described determinations alone or in combination.
When determining that BLE communication is established, control unit 230 may control BLE communication unit 210 so as to transmit an establishment report indicating that BLE communication is established to BLE communication unit 110 of portable device 10.
According to the above control, the control unit 130 of the portable device 10 can control the UWB communication unit 120 by grasping the establishment of BLE communication.
On the other hand, the control unit 130 of the mobile device 10 may independently determine whether or not BLE communication is established based on the above-described conditions.
However, when the ranging value is used as the determination condition, the portable device 10 needs to receive a response to the transmitted BLE signal from the in-vehicle device 20 and perform ranging. Therefore, the BLE communication unit 210 of the in-vehicle device 20 may transmit the third BLE signal to the portable device 10 as a response to the second BLE signal when receiving the second BLE signal.
The first BLE signal and the second BLE signal according to the present embodiment may be signals for sharing shared information for establishing UWB communication between the portable device 10 and the in-vehicle device 20.
The shared information may be information relating to, for example, a frame configuration of a signal used for UWB communication, a rate relating to a transmission rate of the signal, and the like. The shared information may include an encryption key used for encrypting a ranging signal or a data signal in UWB communication (or a random number used for generating an encryption key).
According to the first BLE signal and the second BLE signal as described above, not only power consumption required for UWB communication is reduced using BLE communication, but also shared information required for establishment of UWB communication can be shared using BLE communication, and more efficient communication can be achieved.
Procedure for treatment 1.2
Next, the flow of the processing of the system 1 according to the present embodiment will be described in detail. Fig. 2 and 3 are timing charts showing an example of the flow of the processing of the system 1 according to the present embodiment.
In the case of the example shown in fig. 1, first, the BLE communication unit 210 of the in-vehicle device 20 transmits an advertisement (advertisement) (S102).
Next, the BLE communication unit 110 of the portable device 10 that received the connection request in step S102 transmits a connection request to the BLE communication unit 210 of the in-vehicle device 20 (S104).
Next, at step S104, the BLE communication unit 210 of the in-vehicle device 20 that has received the connection request transmits a first BLE signal to the BLE communication unit 110 of the portable device 10 (S106).
Next, at step S106, BLE communication unit 110 of portable device 10 that has received the first BLE signal transmits the second BLE signal as a response to the first BLE signal (S108).
Next, control unit 230 of in-vehicle device 20 makes a determination regarding establishment of BLE communication based on the second BLE signal received in step S108 (S110).
At this time, for example, control unit 230 may determine that BLE communication is established based on the received signal strength of the second BLE signal.
For example, control unit 230 may determine that BLE communication is established based on the number of BLE communication units 210 that receive the second BLE signal.
Further, control unit 230 may determine the authenticity of portable device 10 based on the second BLE signal and establish BLE communication based on the result of the determination.
When determining in step S110 that BLE communication is established, control unit 230 performs control such that UWB communication using shared information shared by the first BLE signal and the second BLE signal is started.
For example, the controller 230 may control the BLE communication unit 210 so that an establishment report indicating establishment of BLE communication is transmitted to the BLE communication unit 110 of the mobile device 10 (S112).
In this case, the control unit 130 of the portable device 10 shifts the UWB communication unit 120 to the reception standby state for receiving the first UWB signal based on the reception of the establishment report by the BLE communication unit 110 in step S112 (S114).
Then, as shown in fig. 3, the control unit 230 of the in-vehicle device 20 controls the UWB communication unit 220 to transmit the first UWB signal (S116).
Next, the UWB communication unit 120 of the portable device 10 transmits the second UWB signal as a response to the first UW signal received in step S116 (S118).
Next, the control unit 230 of the in-vehicle device 20 determines the positional relationship between the portable device 10 and the in-vehicle device 20 acquired based on the first UWB signal and the second UWB signal (S120). The first UWB signal and the second UWB signal according to the present embodiment may be provided as sequences obtained by encrypting pulse sequences for position relationship acquisition.
At this time, the control unit 230 may determine whether the distance between the portable device 10 and the in-vehicle device 20 is within a predetermined range, or whether the direction of the portable device 10 with respect to the in-vehicle device 20 is within a predetermined range, for example. The control unit 230 may determine whether or not the position of the portable device 10 calculated from the distance and the direction is within a predetermined range.
When it is determined in step S120 that the portable device 10 and the in-vehicle device 20 are in the predetermined positional relationship, the control unit 230 controls the controlled device to execute a predetermined operation (S122).
The flow of the processing of the system 1 according to the present embodiment is described above by taking an example. The flow of the processing described above is merely an example, and the processing of the system 1 according to the present embodiment is not limited to such an example.
For example, as described above, the first UWB signal according to the present embodiment may be transmitted by the mobile device 10, or the second UWB signal may be transmitted by the in-vehicle device 20.
In this case, after determining that BLE communication is established in step S110, control unit 230 of in-vehicle device 20 shifts UWB communication unit 220 to the reception standby state. Further, the control unit 130 of the portable device 10 causes the UWB communication unit 120 to transmit the first UWB signal based on the reception of the establishment report by the BLE communication unit in step S112.
In fig. 3, the processes in steps S116 to S122 are described once, but the processes may be repeatedly executed. That is, the system 1 according to the present embodiment may continue to perform the location replenishment of the mobile device 10 after the BLE communication is established.
According to the above-described continued processing, for example, various kinds of control according to the positional relationship between the portable device 10 and the in-vehicle device 20 can be realized, such as unlocking the door of the vehicle on which the in-vehicle device 20 is mounted when it is detected that the portable device 10 is located in the vicinity of the outer side of the door, and then allowing the engine to start when it is detected that the portable device 10 is located in the cabin of the moving body.
In this case, the in-vehicle device 20 may end the processing related to the position supplement of the portable device 10, for example, using the start of the engine or the like as a trigger. In this case, the end of the process may be shared with the mobile device 10 via either UWB communication or BLE communication.
On the other hand, for example, when the engine is stopped, or when the door of the mobile body is opened, the in-vehicle device 20 may restart the position supplement of the mobile device 10 using these conditions as a trigger. In this case, the in-vehicle device 20 may restart the process from the transmission of the advertisement in step S102 shown in fig. 2.
After that, when the locking of the door of the mobile body is instructed, or when the state in which the distance between the mobile device 10 and the in-vehicle device 20 is separated by a predetermined distance or more continues for a predetermined time or more, the in-vehicle device 20 may use these as a trigger to end the processing related to the position compensation of the mobile device 10.
In this way, the flow of the processing in the system 1 according to the present embodiment can be flexibly modified.
< 2. supplement
Preferred embodiments of the present invention have been described above in detail with reference to the accompanying drawings, but the present invention is not limited to such examples. It is clear that a person having ordinary knowledge in the technical field to which the present invention belongs can conceive various modifications and alterations within the scope of the technical idea described in the claims, and it should be understood that these modifications and alterations naturally also belong to the technical scope of the present invention.
Note that a series of processes of each device described in this specification can be realized by any of software, hardware, and a combination of software and hardware. The program constituting the software is stored in advance in a recording medium (non-transitory medium) provided inside or outside each apparatus, for example. Each program is read into the RAM during execution of the computer, and executed by a processor such as a CPU. The recording medium is, for example, a magnetic disk, an optical disk, an opto-magnetic disk, a flash memory, or the like. The computer program may be distributed, for example, via a network without using a recording medium.

Claims (13)

1. A control device is provided with:
at least one BLE communication unit that performs BLE communication, which is wireless communication according to a BLE communication standard, with another communication device;
at least one UWB communication unit that performs UWB communication, which is wireless communication according to a UWB communication standard, with the other communication device; and
a control unit that controls the BLE communication by the BLE communication unit and the UWB communication by the UWB communication unit,
the control unit executes control so that the UWB communication is started when the BLE communication is established.
2. The control device according to claim 1,
the control unit determines whether or not the BLE communication is established based on a second BLE signal transmitted by the other communication device in response to the first BLE signal transmitted by the BLE communication unit in the BLE communication.
3. The control device according to claim 2,
the control unit determines that the BLE communication is established when the received signal strength of the second BLE signal received by at least one BLE communication unit exceeds a predetermined threshold value.
4. The control device according to claim 2,
the control unit determines that the BLE communication is established when at least two or more BLE communication units receive the second BLE signal.
5. The control device according to claim 2,
the control unit determines that the BLE communication is established when the authenticity of the other communication device is confirmed based on the second BLE signal.
6. The control device according to any one of claims 2 to 5,
the first BLE signal and the second BLE signal are signals for sharing information for establishing the UWB communication between the control device and the other communication device,
the control unit performs control so that the UWB communication using the shared information is started when the BLE communication is established.
7. The control device according to any one of claims 1 to 6,
when the BLE communication is established, the control unit causes the UWB communication unit to start a process related to transmission or reception of a signal transmitted and received in the UWB communication.
8. The control device according to claim 7,
when the BLE communication is established, the control unit causes the UWB communication unit to transmit a first UWB signal for estimating a positional relationship with the control device and the other communication device.
9. The control device according to claim 7,
when the BLE communication is established, the control unit performs control so that the UWB communication unit can receive a first UWB signal for estimating a positional relationship with the control device and the other communication device.
10. The control device according to any one of claims 1 to 9,
the control unit causes the controlled device to execute a predetermined operation when it is determined that the control device and the other communication device are in a predetermined positional relationship based on the UWB communication.
11. The control device according to any one of claims 1 to 10,
the control device is mounted on a mobile body.
12. A recording medium storing a program for causing a computer to realize:
at least one BLE communication function that performs wireless communication, i.e., BLE communication, with another communication device according to a BLE communication standard;
at least one UWB communication function for performing UWB communication, which is wireless communication according to the UWB communication standard, with the other communication device; and
a control function for controlling the BLE communication by the BLE communication function and the UWB communication by the UWB communication function,
and causing the control function to execute control so that the UWB communication is started when the BLE communication is established.
13. A system, wherein,
comprises a control device and a communication device,
the control device includes:
at least one BLE communication unit configured to perform BLE communication, which is wireless communication according to a BLE communication standard, with the communication device;
at least one UWB communication unit that performs UWB communication, which is wireless communication according to a UWB communication standard, with the communication device; and
a control unit that controls the BLE communication by the BLE communication unit and the UWB communication by the UWB communication unit,
the control unit executes control so that the UWB communication is started when the BLE communication is established.
CN202110672963.6A 2020-07-30 2021-06-17 Control device, recording medium, and system Pending CN114095937A (en)

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